Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Current income tax expense:
United States	$ 64	$ 9,606	$ 4,937
Other Nations	19,282	34,739	24,492
States (U.S.)	1,094	2,287	399
Total current income tax expense	20,440	46,632	29,828
Deferred income tax (benefit) expense:
United States	22,882	(1,480)	(6,058)
Other Nations	(806)	(7,325)	(2,849)
States (U.S.)	(446)	(874)	746
Total deferred income tax (benefit) expense	21,630	(9,679)	(8,161)
Income Tax Expense (Benefit), Continuing Operations	$ 42,070	$ 36,953	$ 21,667